Bromine → Methyl 5-bromo-2-hydroxy-4-methoxybenzoate

Beteiligte Stoffe

Reaktionsschritte

A solution of 9.0 g (56.5 mmol) of bromine in 5 ml of CH2Cl2 is added dropwise to a 0° C. solution of 10.0 g (54.9 mmol) of methyl 4-methoxysalicylate in 90 ml of CH2Cl2. The reaction is stirred at 0° C. to 25° C. over five hours and then concentrated in vacuo to give 13.9 g of methyl 5-bromo-4-methoxysalicylate as a white solid: mp 141°-143° C.) (lit mp 143°-144° C.), Cresp, T. M.; Sargent, M. V.; Elix, J. A.; Murphy, D. P. H., J. Chem. Soc., Perkin Trans., 1, 1973, 340). The material is sufficiently pure to be used in the subsequent reaction.

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